压力扰动促进丙烷水合物生长过程的研究

Study on Pressure Turbulence for Growth Process Promotion of Propane Hydrate

为了研究气体水合物的快速生成方法,可视化实验研究了压力扰动对丙烷水合物生成过程的促进作用,结合丙烷水合物的生成驱动力计算,分析了静态条件下纯水中丙烷水合物层的厚度、生长速率、水合物生成驱动力等水合反应参数,结果表明:在压差为0.1 MPa的压力扰动下,原本停滞35 h的水合反应重新开始生成水合物,气液界面处水合物层厚度2 h内以0.5 mm/h的速率呈线性增长,2 h后生长速率显著减小,在压力扰动后的175 h内,系统平均生长速率达到0.04 mm/h。

In order to acquire fast formation method of gas hydrate,visual experiments of propane hydrate formation have been carried out to study the influence of pressure turbulence on growth process promotion and formation parameters including layer thickness,growth rate and driving force have been analyzed with driving force calculation in formation process.The results show that,after35 hours' suspension,hydrate reaction restarts when the pressure was increased to the initial pressure,0.1 MPa higher than that before turbulence,and thickness at gas-liquid interface linearly increases at the rate of 0.5 mm/h in first two hours and sharply decreases subsequently,and average growth rate is 0.04 mm/h in 175 hours after turbulence.